Water-tube boiler



Oct. '11, 1927. 1,645,330

G. LASKER I WATER TUBE BOILER Filed July 9, 1923 Patented Get. 11, 1927.

UNIT-ED ESTATES OFFICE.

' GEORGE LASKER, O13 CHIGAGQ; ELLINOIS,

WATER-TUBE BOILER.

Application filed July 9,

My invention relates to improvements in water tube" boilers, andhas' for one of its objects the provision of ba'flle means whereby the heated-gases are directed over the tubes in a predetermined manner Anot-her object of my invention is to provide' a boiler of the kihd' described in which "the feed w ateris' introduced at a point away -i'rom the hottest. gases, therebyf permitting any solid matter in said feed water to precipitate out.

The-invention has amongits other objects the production of a boiler of the'kind described, which is simple, compact, reliable,

'efiicient and satisfactory for use wherever.

claims.

Inthe' drawing, wherein I have illustrated the preferred embodiment of my invention, 1 indicates the front wall of a boiler setting,

2 the rear wall and 3 the vertical'side walls thereof A bridge wall 4 is shown as being arranged intermediate 'the' front and rear walls of the setting at the rear of the grate 5,

and the customary fuel and ash doors and the like may be arranged in the setting, as desired.

. lVitlnn the enclosing walls of the setting are arranged a plurality of drums, of which 6 indicates the tront'drum arranged at the upper frontend of the boiler, 7 a rear drum arranged at the lower rear end of the setting, and 8 and 9 a pair of rear drums arranged one above the other, both of said drums being above the rear drum 7. The drum 8 is arranged below thelevel of the drum 6, while the drum 9 is arranged substantially at the same level as the drum 6.

The flue or stack 10 for the discharge of the spent gases is shown as located at the 1923. Serial No. (550,517.

a superhea'ter, andtubes 17 connect Tfthe 'drunis' 8 and 9. A"steam dischai'geoutlet 15 communicates with the npper'side of the .drum 9 and ife'edfwater- 'is'preferiablyintroduced by a fpipe 16 intolthe "iovvergpbraon of f the drum 9, being" partially heated byffthe drysteam discharged into'uienmmj Qbyft'he pipe 14, said feedwaterfi0wing"to;the drum 8 through the pipes 17.

The gases at the region ofthe; drums Sand 9 are practicallyat their coolest" temperature,'so that there will be butlittle'tendency of any caking. of the solid' matter 'inithe water. Any such .s o1i-dsinthewateraespecially where-foul .feed water. is used, fmay' set- "tle and precipitate out so 'that*it'-mayf.-be drained from the drum 8 from time 'to-ti ne through the drain 18. "A drain '19 is pro-vided for the drum 7 as shown.

The banks of tubes are spaced apart quite a distance so as to permit the'entrance of a person 'therebetween and access doors 20 are arranged in the setting to comrn'unicate 'w'ith the spacesbetween the adjacent banks,-as

Sh'OWIl. "Battles are arranged to direct'the heated gases over the tubes in a; predeterm ned path, the bafiie 21 extending freni'the bridge wall 4 alongthe'b'ottom' of the tubes '11 toward the front of theb'oiler;'the'baflle '22 extending from-the front drum to adja cent the drum 7 on top of'the tubes 11, the battle 23 extending from the drum 7 on top of the tubes 12 to adjacent the-drum 6', and the baffle 24 extending on top of'thejtubes "13 fromthe'drum 6 to'the drum 8. I The top wall 25 of the setting forms substantially a battle above the bank of the superheater tubes M. a

The heated gases arising from the fuel bed on the grate 5 will pass overthetubes in substantially the direction shown by the arrows in the drawing, such gases decreasing in volume as they move from their hottest'point to their coolest point. -The'variat-ion'in volume of the gases is taken account of by varying the number of tubes inthevarious banks; that is, there are more tubes inthe' banks adjacent the hottest gases thanthere 'areinthe bank over whichthe cooler: gases] pass, orin other words, there are more tubes in the bank 11 than-in the bank 12, and-more tubes-fin the bank 12 than in the bank 13.

The heated gases pass along the tubes in a direction reverse to that in which the greatest proportion of the water-flows in the tubes. For example, the path of the water in the lowest bank of tubes will be from the drum 7 to the drum 6, and the gases will flow in the opposite direction. The relation between the flow of water and the gases as regards the.

lent circulation at this point and hence any 'solid matter in the feed water, especially where foulfeed water is being used, is given a chanceto precipitate out to the bottom of the drum 8.

The water levels of the drums6 and 9 may be maintained substantially at a com-- mon level, as these two drums communicate wlthjoneanother. There are two complete clrculatlng units in the holler, namely, the

' unit comprising the drums 6 and 7 and their connectingtubes, and the unit comprising the pair of drums 8 and 9, the drum 6 and their connecting tubes.

Having thus described my invention, it is obvious that various immaterial modificaftions maybe made in the same without departing from the spirit of myinvention; henceI do not wish to be understood as limiting myself to the exact form, construction, arrangement and combination of parts herein shown and described, or.uses mentioned.

What I claim as new and desire to by Letters Patent is:

1. In a device of the kind described and secure in combination, a boiler having a front drum, a rear drum at the lower end of the boiler,tubes connecting said drums, a pair of vertically spaced drums at the rear of said boiler above said rear drum, tubes connecting said pair of drums, tubes connecting each of said pair of drums directly with the front drum, said first mentioned rear drum communicating with said pair of drums solely through sald front drum, means for 1ntro-' ducing feed water into the uppermost drum of said pair of drums, and a steam outlet from one of said drums.

2. In a device of the kind described and in combination, a boiler having a front drum,

arear drum at the lower end of the boiler,

tubes connectingsaid drums, a pair of ver- 'tic'ally spaced drums at the rear of said boiler above sa d rear drum, tubes connect-' j ing said pair of drums, tubes connecting each of said pair of drums directly with the front drum, sa d first-mentioned rear drum communicating with said pair of drums solely through said front drum, means for 1ntro-' ducing feed water into the uppermost drum of said pair of drums, and a steam outlet from said last-mentioned drum.

3. Ina device of the kind described and in combination, a boiler having a front top drum, a rear drum, tubes connecting said drums, a pair of vertically spaced rear drums above said first-mentioned rear drum, tubes connecting said pair of drums, tubes connecting each of said pair of drums with the front drum, means for introducing feed water into the upper of said pair of drums, a steam outlet from said last-mentioned drum, an enclosure about allof said drums and tubes and having a flue at its top adjacent the front above said front drum, and baflles for directing the gases over said tubes in a predetermined manner.

l. In a device of the kind described and in combination, a boiler having a front top drum, a rear drum, tubes connecting said drums, a pair of drums arranged one above 'the other at the rear of said boiler above said rear drum, an enclosure for all of said drums, the lower of said pair of drums being spaced forwardly from the rear of said'enclosure, tubes connectingjsaid pair of drums, tubes connecting each of said pair of drumswith the front drum, said first-mentioned rear drum communicating with said pair 0 drums solely through said front drum, a

steam outlet from the upper of said-pair of with the front drum, said first-mentioned rear drum communicating with said pair of drums solely through said front drum, a steam outlet from the upper of said pair of drums, means for admitting feed water into said last-mentioned drum, and a flue in said enclosure. at its front above said front drum.

6. In a device of the kind described and in combination, a boiler having a front top drum, a rear drum, a pair of banks of tubes connecting said drums, a bridge wall intermediate said drums, a bafiie extending along the bottom of the lower bank from the;

bridge wall toward the frontof said tubes, a baflie on top of said lower bank of tubes from the front thereof to adjacent the rear end, a bafile on top of the upper bank from the rear to adjacent the front end, a pair of drums arranged one above the other at the rear of said boiler above said rear drum,

the lower of said pair being below the elevation of the front drum, an enclosure for all from the upper of the rear of said pair of of said drums, the lower of said pair of drums, means for admitting feed Water 0 drums spaced forwardly from the rear of into said last-mentioned drum, and a flue in said enclosure, tubes connecting said pair of said enclosure at its front above said front drums, tubes connecting each of said pair drum.

of drums with the front drum, a baffle along In testimony whereof, I have hereunto the top of said last-mentioned bank of tubes signed my name. 7 from front to rear thereof, a steam outlet GEORGE LASKER. 

